#include<stdio.h>
#include<math.h>


int main (void){
    int result_1 = 2 + 10 / 8 * 3;
    double result_2 = 2 + 10 / 8.0 * 3;
     printf("result_1:%d\n",result_1);
     printf("result_2:%lf\n",result_2);

    int a = 1;
    int b = 9;
    int c = 20;
    int delta = sqrt(pow(b,2) - 4 * a * c);
    double x_1 = (-b + delta)/2 * a; 
    double x_2 = (-b - delta)/2 * a; 
    printf("��һԪ���η��̵Ľ�Ϊ��%lf,%lf\n",x_1,x_2);
    


     
}